How can I insert new content in a Word document after an endnotes section.

I am formatting for publication a book manuscript using Office 365 Word on a Windows 11 based computer. The document originally was written as 10 separate chapters in docx format with foot notes. I am controlling pagination in the document headers, and using section breaks to allow the insertion of photograph pages in the near future, so there are multiple sections in each chapter document. For publication, I want to combine the chapters into a master document, and convert the footnotes to endnotes. However, after the endnotes I need to insert a bibliography, an index, and an “about the author” page. I have learned that Word regards endnotes as the true end of document and does not allow new section or page breaks, or the insertion of a new page after the endnotes section. However, I’ve found suggestions as to how to bypass the restriction, but I have not been able to make them work. Can you provide a technique to make this possible? I want to get an accurate page count for the final manuscript including the elements that will be added after the notes.